New Milton is a market town and civil parish in the New Forest district, in southwest Hampshire, England. To the north is in the New Forest an…New Milton is a market town and civil parish in the New Forest district, in southwest Hampshire, England. To the north is in the New Forest and to the south the coast at Barton-on-Sea. The town is equidistant between Lymington and Christchurch, 6 miles away. In 2011 it had a population of 19,969.